WW CORE MUSHROOM SOUP

6 cups sliced fresh mushrooms, or 3 cans (7 oz.)  mushrooms
1/2  cup finely chopped onion
1/2 cup finely chopped celery
2 teaspoon  healthy oil
1 teaspoon dried Basil leaves
1/2 teaspoon salt
1/4 teaspoon pepper
3 cups fat free chicken broth
3 cups fat free evaporated milk

In large saucepan, saute' mushrooms, onion and celery in oil until tender;
use extra chicken stock to saute'  the mushrooms in if you find that
2 teaspoons of oil is note enough.
Add the rest of the ingredients and stir till warmed through; do not boil.